Circuit-breaker for electrical conductors.



No. 844,961. PATENTE'D FEB;.19,'1907L W. 0. SHAW. I

CIRCUIT BREAKER FOR ELECTRICAL counnmroas.

APPLICATION FILED AUG. 2, 1906.

WITNESSES I INVENTOH WlLLlAM OSHAW A TTOHNE Y8 r-Hs NORRIS PETERS ca.,wAsuINamzv, u c.

UNITED STATES PATENT OFFIOH.

WILLIAM COLUMBUS SHAW, OF WHITE PLAINS, MARYLAND, ASSIGNOR TO JOHN M.BOARMAN, OF FAULKNER, MARYLAND.

Specification of Letters Patent.

Patented Feb. 19, 1907.

Application filed August 2,1906. Serial No. 328.839.

To to whom zit 'IIZ/CLZ/ concern.-

Be it known that I, /VILLIAM COLUMBUS SHAW, a citizen of the UnitedStates, and a resident of White Plains, in the county of Charles andState of Maryland, have invented certain new and useful Improv ements inCircuit-Breakers for Electrical Conductors, of which the following is aspecification.

My invention is an imp ovement in c rcuit-breakers for electricalconductors, and. is particularly designed for use on overhead wiresforming parts of a circuit; and the invention consists in certain novelconstructions and combinations of parts, as will be hereinafterdescribed and claimed.

In the drawings, Figure 1 is a front elevation, partly in section, of adevice embodying my invention. Fig. 2 is a vertical section on aboutline 2 2 of Fig. 1. Fig. 3 is a view similar to Fig. 1, but showing theparts with the circuit broken. Fig. 4 is a bottom plan view of theconstruction shown in Fig. 1. Fig. 5 is a detail perspective view of oneof the brackets, and Figs. 6 and 7 show slightly differentconstructions.

By my invention I provide, in connection with the sections A and A ofthe line-wire, independent circuit making and breaking sections B and C,which, except for the fact that they are rights and lofts, may be madesubstantially alike, and in connection with these sections B and C, towhich the wire sections A and A are respectively attached, I providemeans whereby as one of the independent sections B and C drops with thebreaking of its respective wire said section is moved laterally awayfrom the opposite section in such manner as to break the electri calconnection between the two.

In the construction shown I make the sections B and O with the circularheads or disks B and O, which are concentric and are journaled,respectively, on the stub-shaf ts D and D, being for such purposeprovided with the thimbles B and C", which encircle their respectiveshafts and are provided wit comslots B and O into which project pins dand d from the respective stub-shafts D and D. These cam-slots C and Bare so formed relatively to their pins d and d that when the respectivesections drop they will be caused to move, as will be understood fromFigs. 1 and 3, from the position shown in Fig. 1 to that shown in Fig.3, in whichlatter figure it will be noticed the section B is adjustedlaterally away rom the opposite section, breaking the electricalconnection which is established when the parts are in the position shownin Fig. 1. By preference one of the sections B and C '(shown as thesection O) is provided, surrounding its head,with thelaterally-projecting circular flange C, which when the parts are in useoverlaps the head B (see Fig. 1) and operates to shield and interlockthe parts in the direction of the linewires A and A, so the srain of theline-wire will be borne by both of the circuit making and breakingsections.

The stub-shafts D and D may be parts of bracketsections E and F orbolted thereto to facilitate removal of sections B and O, as shown inFig. 6, said sections being made L shape, with the upright wings havingthe stub-shafts D and D on their inner sides and. projecting toward eachother and also having the horizontal Wings 6 and f, which overlap attheir extremities and are united by a bolt G, suitable insulation beingmade between the horizontal wings E and F at H and surrounding the boltG at H and also at H between the flange G on the bolt G and the upperhorizontal wing e of the bracket-section E, as best shown in Figs. 1, 2,3 of the drav ings. The belt G may be connected in any suitable way withthe overhead support, as will be understood by those skilled in the art.The horizontal wings e andf may be curved, as shown in Fig. 7, providedon their adjacent faces with ribs 6 and f, as will be understood fromFigs. 2 and 5, to prevent any twisting of the bracket-sections, and inpractice I find it desirable to screw the pins d and (Z into theirrespective stub-shafts, as best shown in Fig. 2.

It will be noticed in Fig. 1 that the stubshafts are spaced. apart attheir inner adjacent ends, so that when the sections B and C are incontact, as shown in Fig. 1, they alone complete the electricalconnection, and when one or the other of the said sections drops in caseits section of wire is broken or detached in any manner and drops thesaid circuit making and breaking section will by the ac tion of itscam-slot be adjusted laterally out of contact with the opposite section,as will be best understood from Fig. 3 of the drawings. Thus it will benoticed that the circuit making and breaking sections are sustained incontact by their respective line-wire sec tions, and when such wiresections become detached they will drop and automatically adjust theircircuit making and breaking sections laterally to break the circuit asdesired. It will be noticed that the stub-shafts are concentric and inalinement and form supports for the circuit making and breaking sectionsin the operation of the invention.

I claim 1. The combination substantially as herein described of thebracket-sections having the horizontal wings, the bolt connecting thesame and insulating devlces at the connec tion between the horizontalwings of the bracket-sections, the said sections being also providedwith depending wings, and with stub-shafts extending thence inwardtoward each other and spaced apart at their inner adjacent extremities,the circuit making and breaking sections having heads movable laterallyinto and out of contact and provided with thimbles fitting on theirrespective stubshafts, and provided with ca1nslots, and pins projectingfrom the stub-shafts into the cam slots of their respective thimbles,substantially as set forth.

2. In a circuit maker and breaker for electrical conductors, thecombination of a pair of making and breaking sections movable laterallyinto and out of contact with each other and having extensions forconnections with line-wire sections, supports on which said making andbreaking devices are supported to turn and move laterally, and meansoperated by the turning movement of said section or sections to effect alateral movement thereof, substantially as set forth.

3. The combination of the independent line-wire sections, theindependent making and breaking sections to which said linewire sectionsare respectively connected, a support on which said making and breakingsections are mounted to turn, and means operated by the relative turningof the sections to move the same laterally, substantially as set forth.

4. The combination with the stub-shafts spaced apart at their inneradjacent ends, of circuit making and breaking scctions having thimblesjournaled on their respective shafts and provided with cam-slots andpins projecting from the stub-shafts into the slots of their respectivethimbles, substantially as set forth.

5. The combination with the stub-shafts and the circuit making andbreaking devices mounted on their respective stubshafts, of camoperating devices whereby the l said sections may be caused to movealong i their shafts when turned thereon, substanl tially as set forth.1 6. The combination in a circuit-breaker l for electrical conductors,of the bracket having depending side wings and stub-shafts projectinginwardly therefrom, the circuit making and breaking sections supportedon their respective stub-shafts and adapted to turn thereon, and camdevices whereby the turning of either of said sections on its stub-shaftwill cause it to move laterally with respect to the opposite section,substantially as set forth. i 7. A supporting-bracket composed ofsections having top wings, devices connecting the same and means forinsulating the connection between the said wings and also provided withdepending wings, and with stubl shafts projecting inwardly therefromtoward each other and spaced apart at their inner extremities andcircuit making and breaking sections movable into contact with each lother between the spaced-apartends of the stuloshafts, and means wherebythe said making and breaking sections as they turn on their stub-shaftsmay be caused to move along the said shafts, as set forth.

8. A circuit-maker for electrical conduc tors comprising a pair ofindependent making and breaking sections having concentric heads adaptedto contact one with the other supporting means upon which said sectionsare mounted to turn and move laterally, and means operated by theturning of said sections relative to each other to effect a lateralrelative movement of said sections, substantially as set forth.

9. A circuit making and breaking device for electrical conductorscomprising a pair of alined stub-shafts spaced apart at their adjacentends, connecting means between the outer ends of said shafts andprovided with insulating devices, circuit making and breaking sectionsjournaled on and movable along their respective stub-shafts and camdevices for effecting a longitudinal movement of the making and breakingsections along their respective stub-shafts, as the said sections areturned, substantially as set forth.

WILLIAM COLUMBUS SHAW.

Witnesses:

JOHN T. OWEN, WILLIS SPALDING.

ICS

